I couldn’t find anything about how to make Snips work with Mopidy. I tried a fresh install following: https://github.com/snipsco/snips-platform-documentation, but I couldn’t get it to work. (Mopidy worked fine, installed mopidy-spotify and mopidy-iris en could listen to music)

Thanks for your interest !
In the Snips Platform Documentation, you will find documentation about our technology, and how to interface it with other programs.
It’s important to understand the scope of Snips, which is :

Record your voice

Transcribe it to a written sentence (Automatic Speech Recognition aka ASR)

Perform Natural Language Understanding and classify the sentence into an Intent and extract slots for the intent.

This is normal that you didn’t find anything on how to interface Snips with Mopidy.